* Use /run as default location for lock files for U-Boot tools
While there is a command line parameter to set the lock file explicitly,
there are other tools invoking fw_setenv (in particular rauc) which do
not set the lock file. Using /run by default makes fw_setenv use the
correct lock file in all situations.
* Don't explicitly set lock file location
Since we patch U-Boot tools to use /run by default setting it explicitly
is unnecessary.
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